Casting machine



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A. W. ATKINS CASTING MACHINE Filed Jan. 4, 1922 2 Sheets-Sheet l lip Ill.

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Patented Dec. 2, 1924.

UNITED STATES ALFRED W. ATKINS, 0F BROOKLYN, NEW YORK.

CASTING MACHINE.

Application led January 4, 1922. Serial No. 527,014.

To all whom it may concern:

Be it known-that I, ALFRED lV. ATKINs, a citizen of the United States, residing at Brooklyn, New York, have invented new and useful Improvements in Casting Machines, of which they following is a specification. l

This invention relates to casting machines and more particularly to centrifugal casting machines.

One of the objects of the present invention is to provide a centrifugal casting machine of simple and practical construction which will be reliable and efficient in use and operation, of durable construction and safe to operate. -A further object is to provide centrifugal casting machine which will permit rapid and almost continuous operation.

A further object is to provide centrifugal casting machines which will more effectively distribute the metal to the interior of l the'mold and more rapidly 'chill or cool the `metal after it has been cast.

' A further object is to provide a centrifugal casting machine with improved balancing means whereby the metal will be more. evelndly distributed about 'the interior of the mo Otherobjects will be in part obvious and in part hereinafter pointed out in connection with the accompanyingsheets of drawings illustrating one of various possible embodiments of the present invention.

In these drawings, Figure 14 is a vertical, sectional view showing such parts of the apparatus as to enable one skilled in the art to thoroughly understand and construct the same. v l

Figure 2 (is a sectional view take-n just below the receptacle shown in Figure 1.

Referring to the drawings in detail and more particularly to Figure 1, 5 denotes a fixed and substantially rigid frame work' upon which the molding apparatus is mounted. The central part of the frame work 5 is provided with bearings 6 and 7 for supporting a vertically disposed shaft 8, which shaft is supported by an end thrust bearing' 10 in `a. fixed base 11 and carries what may be termed two balancesor fly wheels 12 and 13 at approximately its opposite ends.l The purpose of these balancing wheels is to maintain the mold rotating 4about a fixed vertical axis and at a high' rate of speed after the mold has beenA speedmanner as by means of nuts 32.

wound thereabout and coacting between the.

support 5 and end nuts 18. This will permit a slight play and yet allow the shaft 8 tocome to Ia fixed central vertical axis while the machine is in operation.-l The support carries near its outer periphery a plurality of roller or ball bearing supports 20 as shown in Figure 2- upon which a controller plate 21 is adapted to rest. This plate is provided with a plurality of circumferential grooves, both top and bottom and the upper grooves carry a series ofA balls' 22 coacting with grooves on the under side of the balance wheel 13 thereby to eliminate friction `as much as possible. Likewlse ball bearings 23 are assoc1ated with the lower ily wheel between the supporting` base 11 and the frame work 5. The frame work 5 also carries a breaking device comprising a lever or handle 25 having bifurcated arms 26 provided with braking guides 27 adapted to engage the under side 4of the fly wheel .or balance 13.

This .balance 13 supports the "mold as shown in Figure 1 which comprises a double walled cylindrical chamber 28 having a cover plate 30 formed o-f two parts as shown and between which are-located aplurahtv of curved radially disposed vanes.31. This is for thepurpose .of more eiicientlycool- A ing the mold as the lower plate will absorb the heat'and the vanes conduct the heat outwardly and away therefrom. These plates 30 are secured to the mold 28 in any desired Likewise the mold itself is secured to the balance 13 as by mea-ns of bolts or other fastening device 33.- A .small tongue and groove connection 34 is provided between the mold and balance 13 in order to relieve the strain' uponthese fastening devices and maintain the mold in proper position.

It will also be noted that the mold is provided with a convex curved base '35 whereby as the, metalis poured in throu-gl'i the open top 36 the molten metal will at once be diverged outwardly onto the sides of the mold due to the centrifugal action and more los evenly and eiciently distributed there-over.

It is believed that'the constru` tion, method of use and operation of the present device will be clear to those skilled in the art and a further statement thereof is doubtless unnecessary.

The invention comprises a simple and practical molding apparatus which will permit substantially continuous operation. As soon as one mold has been charged and cooled a second mold may be substituted and secured to the base or balance 13. The cooling means provided at the upper part of the moldv will more eliciently conduct the heat from the molten metal and permit an increased production.

Without further analysis, the foregoing will so fully reveal the gist of this invention that others can by applying current knowledge readily adapt it for various app'lications without omitting certain. features that, from the standpoint of the prior art, fairly constitute essential characteristics of the generic or specific aspects of this invention, and, therefore, such adaptations should and are intended to be comprehended within lthe meaning and range of equivalency of the following claims.

What I claim is r'-,

l. In a centrifugal casting machine, in combination, a vertically disposed shaft carrying balance devices at its upper and lower ends and a mold associated with one of said balance devices.

2. In a centrifugal casting machine, in combination, a vertically disposed vshaft carrying balance devices at its upper and lower ends, a mold associated with one of said balance devices, said shaft being supported on a thrust bearing and ball bearings interposed between the coacting fixed and moving surfaces.

3. In a centrifugal casting machine, in comblnation, a vertically disposed shaft carrying a balance at its upper part and coacting balance at its lower part and a yielding bearing permitting slight lateral movement of said shaft.

4. In a centrifugal casting machine, in combination, a vertically disposed shaft having a balance associated with the lower part of said shaft and a mold carried by the upper part of said shaft, said mold comprising a cylindrical chamber having a cover plate and means for conducting the heat away from said cover plate as it is absorbed from the molten metal.

In a centrifugal casting machine, in combination, a shaft near its lower cnd, a balance associated with said shaft, a mold supported at the upper end of said shaft and rotatable therewith, said mold having a convex bottom whereby the molten metal is diverted to the outer sides of thc mold.

6. In a centrifugal casting machine, in combination, a shaft near its lower end, a balance associated with said shaft, a mold supported at the upper end of said shaft and rotatable therewith, said mold having a convex bottom whereby the molten metal is diverted to the outer sides of the mold, lsaid mold having a double cover plate for conducting the heat away from the lower part thereof.

7. In a centrifugal casting machine, in combination, a shaft near its lower end, a balance associated with said shaft, a mold supported at the upper end of said shaft and rotatable therewith, said mold havingr a convex bottom whereby the molten metal is diverted to the outer sides of the mold, said mold having a double cover plate for conducting the heat away from the lower part thereof, said' means comprising a plurality of curved radially disposed veins.

Signed at Brooklyn, N. Y., this 10th day of October, 1921.

ALFRED W. ATKINS. 

